Index: linux/include/linux/page-flags.h===================================================================--- linux.orig/include/linux/page-flags.h+++ linux/include/linux/page-flags.h@@ -51,6 +51,9 @@ * PG_buddy is set to indicate that the page is free and in the buddy system * (see mm/page_alloc.c). *+ * PG_hwpoison indicates that a page got corrupted in hardware and contains+ * data with incorrect ECC bits that triggered a machine check. Accessing is+ * not safe since it may cause another machine check. Don't touch! */